Slow Cooker Beef Curry

2 tbsp tomato purée

1 butternut squash, peeled and chopped into bite-sized chunks

1 large onion, peeled and chopped

3 large carrots, peeled and chopped

3 cloves of garlic, crushed/minced

1 large piece of ginger, peeled and chopped

2 tbsp mild curry powder

350g stewing beef, cut into chunks

1 tin coconut milk

100g frozen peas